- Online-Bounded Analysis.
- Joan Boyar, Leah Epstein, Lene M. Favrholdt, Kim S. Larsen, and Asaf Levin.
Journal of Scheduling. Accepted for Publication.
Though competitive analysis is often a very good tool for the
analysis of online algorithms, sometimes it does not give any
insight and sometimes it gives counter-intuitive results.
Much work has gone into exploring other performance measures,
in particular targeted at what seems to be the core problem
with competitive analysis: the comparison of the performance
of an online algorithm is made with respect to a too powerful adversary.
We consider a new approach to restricting the power
of the adversary, by requiring that when judging a given
the optimal offline algorithm must perform at least as well as the online
algorithm, not just on the entire final request sequence, but also
on any prefix of that sequence.
This is limiting the adversary's usual advantage
of being able to exploit that it knows the sequence is continuing
beyond the current request.
Through a collection of online problems, including
machine scheduling, bin packing, dual bin packing, and seat reservation,
we investigate the significance of this particular offline advantage.
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